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Groups > comp.lang.python > #21471

Re: newb __init__ inheritance

From "Colin J. Williams" <cjw@ncf.ca>
Newsgroups comp.lang.python
Subject Re: newb __init__ inheritance
Date 2012-03-10 17:47 -0500
Organization National Capital Freenet, Ottawa, Ontario, Canada
Message-ID <jjglmi$dao$1@theodyn.ncf.ca> (permalink)
References <1c6db866-6fa3-4de5-96de-51d6720a1300@x17g2000yqj.googlegroups.com> <jjg4p3$lst$1@theodyn.ncf.ca>

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On 10/03/2012 12:58 PM, Colin J. Williams wrote:
> On 08/03/2012 10:25 AM, hyperboogie wrote:
>> Hello everyone.
>>
[snip]
> main()
> I'm not sure that the class initialization is required.
>
> Good luck,
>
> Colin W.
When I wrote earlier, I wondered about the need for initialization.

With Version 2, both __new__ and __init__ were required, not in the 
example below, using version 3.2:
#!/usr/bin/env python

class A():

   def ringA(self):
     print ('aaa')

   def ringB(self):
     print('bbb')

class B(A):
   def __init__(self:)
   def ringB(self):
     print('BBB')

a= A()
b= B()
b.ringB()
b.ringA()
b.__class__.mro()[0].ringB(22)   #  22 is used for the ringB attribute
                                  #  Trial and error shows that any
                                  #  non-Null,including None for the
                                  #  argument gives the same result
z= 1
def main():
     pass

if __name__ == '__main__':
     main()

Colin W.

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Thread

newb __init__ inheritance hyperboogie <hyperboogie@gmail.com> - 2012-03-08 07:25 -0800
  Re: newb __init__ inheritance Maarten <maarten.sneep@knmi.nl> - 2012-03-08 08:30 -0800
    Re: newb __init__ inheritance Peter Otten <__peter__@web.de> - 2012-03-08 18:03 +0100
  Re: newb __init__ inheritance Ethan Furman <ethan@stoneleaf.us> - 2012-03-08 09:34 -0800
  Re: newb __init__ inheritance "Colin J. Williams" <cjw@ncf.ca> - 2012-03-10 12:58 -0500
    Re: newb __init__ inheritance "Colin J. Williams" <cjw@ncf.ca> - 2012-03-10 17:47 -0500
      Re: newb __init__ inheritance hyperboogie <hyperboogie@gmail.com> - 2012-03-11 03:18 -0700
        Re: newb __init__ inheritance Chris Rebert <clp2@rebertia.com> - 2012-03-11 03:38 -0700
          Re: newb __init__ inheritance hyperboogie <hyperboogie@gmail.com> - 2012-03-11 03:56 -0700
            Re: newb __init__ inheritance Chris Rebert <clp2@rebertia.com> - 2012-03-11 04:37 -0700
            Re: newb __init__ inheritance Ian Kelly <ian.g.kelly@gmail.com> - 2012-03-11 05:40 -0600
            Re: newb __init__ inheritance Ian Kelly <ian.g.kelly@gmail.com> - 2012-03-11 05:52 -0600
            Re: newb __init__ inheritance Peter Otten <__peter__@web.de> - 2012-03-11 13:12 +0100
          Re: newb __init__ inheritance hyperboogie <hyperboogie@gmail.com> - 2012-03-11 03:56 -0700
  Re: newb __init__ inheritance hyperboogie <hyperboogie@gmail.com> - 2012-03-12 02:09 -0700

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